A young bugler with supernatural powers is swept up into an epic struggle for the fate of the world. Cry havoc and sound the song of war! In Arboral Year 1294, the world is dominated by nine massive towers known as the Spires--remnants of an advanced civilization, they are filled with lost secrets and powerful knowledge that nations struggle to possess. Luca is a bugler in a mercenary company who wants nothing more than to leave the battlefield behind and become a true musician, a maestro. But marked as one of the enigmatic Branch-hexed, and gifted with the strange ability to see the sound of his instrument, Luca finds himself drawn reluctantly into a war of epic proportions! The strange people of the future town have taken Luca captive, forcing him to participate in a bizarre ritual that brings him into contact with the Druid--the alien entity that brought the Branched powers to earth. The mayor of the town wants Luca to help them create more Branched, and Miura must decide what to do when command of the mission falls to him. The encounter with the hidden town has laid the stakes bare for Luca and his friends, and the struggle for control of the Spires is about to enter a new and even more dangerous phase...